1. J

    Help thinking about Grounding/Safety for LED device

    Hello - I'm creating an LED device and I'd like to have a good understanding of grounding/safety so I don't accidentally harm my users! I'm powering my device with an AC/DC wall mount adapter that outputs 20V which connects to a barrel jack on my PCB. I'm using an LED driver as well that...
  2. A

    Touching live wires on high voltage line.

    Hey everyone :) I'm working as an automation engineer and I've always asked myself why people say, that for example birds, can sit on power-lines, because they aren't touching neutral/different potential and no current is flowing. I can't really get this explanation into my head, because...
  3. C

    Safety of using pump for kid's play sink.

    A similar question was posted on here about 1.5 years ago, but it didn't really address the safety aspect. I want to make a simple play sink for my kid that recirculates the water (to save on water waste). I don't want to use gravity fed or some other manual method because part of the purpose...
  4. Lambo Av

    Circuit Breaker Location

    Hi, in IEEE 3 bus, why are circuit breakers connected at the 'load' rather than connected at the 'generator and load'?
  5. Lambo Av

    Given 3 buses with line impedance, generators and loads provided, where must the protection circuit be allocated?

    The 3 buses are Bus 1: Slack bus with a voltage source of E=1.0 and phase of 0° Bus 2: a generator and a load. Bus 3: a load. The line impedance are given below: z12 = 0.05 + j0.1 z13 = 0.02 + j0.05 z23 = j0.05 z11 = -j100 z22 = infinity z33 = -j40 The generators and loads are given below...
  6. Lambo Av

    How to shut down a wind power plant?

    Just curious, how do they shut down those wind power plants given their tall structure? What are the procedures to do it? Thanks.
  7. Lambo Av

    How to shut down a hydroelectric power plant generator?

    Was cycling near a hydroelectric power plant generator with my sister and she asked me if they can be shut down. I said "Yes, all power plant generators can be shut down". I wasn't sure, so here I am to get some inputs on the safety procedures from AAC readers. Thanks. Any input is appreciated!
  8. M

    best radar for object detection

    Hi everyone, I'm newbie when it comes to radars and need some help. I want to make a radar that can detect people/objects from the back of the car when it is reversing. I have demo position2go kit, but I can't seem to configure it to detect reliably. Sometimes it detects when nothing is there...
  9. M

    Batteries down the well

    Hi, I am a first time poster in need of some advice. Whilst inspecting my household drinking well, my torch with four 18650 cells plunged to the bottom. The torch is waterproof but probably not at the 24ft depth of my well. What reactions are likely to take place, and what if any...